The McDonnell & Miller 47-2 Mechanical Water Feeder (Part Number: 132800) is a float-operated device designed for steam and hot water boilers with cold water feed. It ensures continuous maintenance of the minimum safe water level, operating independently of electrical service. The unit features proportional feed action, quick hook-up fittings, and a quick-change replaceable cartridge valve and strainer for ease of maintenance. Equipped with a No. 2 switch, it adds a low water cut-off function to enhance boiler safety.
Associated Parts:
- Compatible with McDonnell & Miller low-water cut-offs, such as Series 47.
- Replacement parts include float assemblies, gaskets, and valve kits.
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| Manufacturer | McDonnell & Miller |
| Model | 47-2 |
| Part Number | 132800 |
| Application | Steam and Hot Water Boilers with Cold Water Feed |
| Function | Mechanical Water Feeder and Low Water Cut-Off |
| Switch Type | No. 2 Switch (Automatic Reset) |
| Maximum Water Supply Pressure | 150 psi (10.5 kg/cm²) |
| Maximum Inlet Water Temperature | 120°F (49°C) |
| Maximum Boiler Pressure | 25 psi (1.8 kg/cm²) |
| Connection Size | 3/4″ Threaded (NPT) |
| Features | Proportional Feed Action, Quick Hook-Up Fittings, Quick-Change Replaceable Cartridge Valve and Strainer |
| Electrical Ratings | 10.2 A @ 120 VAC; 5.1 A @ 240 VAC |
| Dimensions (Width) | 11-7/8″ |
| Warranty | 1 Year from Installation or 2 Years from Date of Manufacture |